I also have a bit of an intermittent issue going on with my starboard 4/1 gauge and Vessel View gauges. I thought it was related to the momentary ignition switch. I replaced that switch but it is still happening.

 

The Dieselview drives the gauges. If neither the Dieselview nor gauges work then probably a systemic issue with the harnessing or connectors or a failure within the Dieselview unit (but unlikely). First swap the CAN 1 resistors (yellow capped connectors on the helm J-boxes and see if the problem follows to the other side. Then swap the CAN 123 resistors on the engine harness (yellow capped connectors on the engine harness' and also see if the problem follows. If the problem follows a resistor swap then a defective resistor. If the resistors are ok then swap the port and starboard engine main cables (circled in the below diagram) coming into the helm at the J-boxes; they should be the large yellow cables that terminate into two J-boxes under the helm. If the gauge problem follows that swap then the issue obviously exists between the engines and the end of that yellow cable. If the issue does not follow then the issue is between the J-boxes, Dieselview, and gauges.

 

The Dieselview drives the gauges. If neither the Dieselview nor gauges work then probably a systemic issue with the harnessing or connectors or a failure within the Dieselview unit (but unlikely). First swap the CAN 1 resistors (yellow capped connectors on the helm J-boxes and see if the problem follows to the other side. Then swap the CAN 123 resistors on the engine harness (yellow capped connectors on the engine harness' and also see if the problem follows. If the problem follows a resistor swap then a defective resistor. If the resistors are ok then swap the port and starboard engine main cables (circled in the below diagram) coming into the helm at the J-boxes; they should be the large yellow cables that terminate into two J-boxes under the helm. If the gauge problem follows that swap then the issue obviously exists between the engines and the end of that yellow cable. If the issue does not follow then the issue is between the J-boxes, Dieselview, and gauges.
View attachment 76102

First I must apologize for being 4 years late to the party!
Where did you get that "main station configuration" schematic? I looked thru my searay manual several times and could not find. I also looked on Cummins quick serve but not in depth.
This whole subject of how to replace Diesel View when its time comes is fascinating and very scary.
My problem which surfaced at pre purchase sea trial is not getting starboard engine transmission pressure. This was noted by cummins tech using "Insite" and tran pressure reading 0 on smartcraft DV. All other data was present for both engines. Insite and DV.
I used wd40 on pressure transducer connector and still 0. Switched pressure transducer between port and starboard eng. Starboard still read 0.
I will try your suggestion to look for 5 volts at transducer connector. I will diligently trace (to degree I can see it) wires back from pressure transducer to eng. It appears there is a small connector before eng. Not sure what to do after this.

 

TTMOTT - Thank you for the detailed writeup and schematic. That gives me additional information and a process to try. Much appreciated!! It is still a bit strange to me that my gauges appear to be working now but my Dieselview shows no Port data,only Stbd....

 

Different problem but a big one none the less. I just did my 1000 hr service and on the port engine I disconnected several of the wire harness plugs to facilitate removal of the oil and fuel cooler as well as the aftercooler. When I started the engines to leak check the alarm sounded on the Diesel View and showed that I had low fuel level and low water flow. The engine started and ran with no problem and I have plenty water flowing thru the exhaust. The boat has 1/4 tanks of fuel. When trying to figure things out by scrolling thru data I noticed also that I had no gear oil temp or pressure data for the port engine.
I am wondering if I have to reconfigure the system since the wires were disconnected. There is no guidance on this in the DV operators manual at all. Any one have any ideas? I noticed that after fiddling with the DV that all of a sudden I have no data fields for the gear oil temp or pressure for either engine.
Very Frustrating! Any help would be very appreciated.
Rusty Mayes

 

Different problem but a big one none the less. I just did my 1000 hr service and on the port engine I disconnected several of the wire harness plugs to facilitate removal of the oil and fuel cooler as well as the aftercooler. When I started the engines to leak check the alarm sounded on the Diesel View and showed that I had low fuel level and low water flow. The engine started and ran with no problem and I have plenty water flowing thru the exhaust. The boat has 1/4 tanks of fuel. When trying to figure things out by scrolling thru data I noticed also that I had no gear oil temp or pressure data for the port engine.
I am wondering if I have to reconfigure the system since the wires were disconnected. There is no guidance on this in the DV operators manual at all. Any one have any ideas? I noticed that after fiddling with the DV that all of a sudden I have no data fields for the gear oil temp or pressure for either engine.
Very Frustrating! Any help would be very appreciated.
Rusty Mayes

Rusty - these peripherals (fuel level, gear oil pressure, water flow, etc) I believe are wired to the SIM module (see below schematic) and the SIM module then gets that data on the Smartcraft CAN H (CAN 1) network. The SIM module is the black box with Motorola printed on it. You might have scrambled the SIM module if the power was turned on with the sensors disconnected. First check the SIM module fuse in the harness then verify all of the connections then turn on the ignition key then cycle in slow (one or two second) intervals the helm ignition switch on and off three times then leave on but don't crank or start the engine. It should re-acquire the data.

 

Thank you, I know what to look for now. I think I was so far into the Forrest I couldn’t see the trees! I’ll have a chance today to try your reset protocol.
I really appreciate the help on this.
Rusty

 

Well I checked the fuses, verified all plugs are clean and secure and cycled the engine start rockers three times with no resolution. I disconnected all power from the boat and then powered everything up again and tried the three cycles on the rocker start switches again with no change. I am wondering if I should consider swapping SIM modules between engines and see it the problems follow the SIM. What makes no sense is that I removed and cleaned the starboard engine fuel and gear oil cooler and had no problems with those indications upon start up. Only the port engine is having the issues. Has anyone had success getting help from Cummins with the Diesel View trouble shooting? This just might be the straw that breaks the camel's back with me upgrading to anything else!
Carpe Diem

 

Sorry to hear.... Do not swap the SIM modules; they are specific to the engine and features (steering, fuel tank, ets) that are tied into them. There is an instance 0 and instance 1 that sets in their memory when installed... I learned all of this from the work Shearwater Marine (Stuart Fl) did on my engines after a lightning strike. Their (Shearwater) biggest issue was to get the SIM's to communicate on my boat. I suspect possibly the ground to the sensors you are not seeing has been lost. For example on the gear oil pressure connector you should get 5 volts between pins 1 and 2 when the ignition is on. I suspect ground because you are not getting fuel level either which operates from a ground bias (it is not fed positive voltage) but same ground wiring as the gear oil temp and pressure. Look at the wiring schematic posted previously. If the 5 volt instrument power provided by the SIM (for example) was shorted then the SIM will return an error to the DV, however, it may not with a loss of the ground. Last ditch thing you can try is to short out the seawater flow switch (which is the thermo-switch) on the water cooled exhaust with the ignition on and see if a fault is returned on the DV; short the two bare conductors on the switch together. This verifies communication between the SIM and DV and does not use the same conductors as the other sensors.

 

Problem Solved! Big shout out to ttmott (CSR) and Corey Schmidt from SB Marine for the trouble shooting advice. Turned out to be a bad Medusa Harness on the port engine. I kept putting off removing the harnesses to swap them partly because after studying the Cummins Quantum Schematics that Tom sent me I was convinced the problem had to be either in the SIM or the OEM harness. Today I took a deep breath, removed the harnesses and swapped them between engines and viola the problem followed the harness just like Corey said it might. New one is on order which will mean I can take a nice break from contortionist practice in the engine room. I was going to dig through the old harness and just fix the open or short which ever but then thought... for $200 what's the point. If I had half a brain I'd buy one for each engine.
Carpe Diem

 

Carpe Diem
That is great news. Does that harness run from the engine to the helm dash or is it contained in the bilge?

 

The harness he replaced is between the engine OEM connector interface and the harness that runs up to the bridge; there is a round 14 pin connector between the two.

 

I have the same problem on my gas engine my starboard engine no gauge at all also I can see my starboard engine on my smartcraf just wandering if that would be my problem too??? I change my smart craf with brand new one out of a box it work fine for 2 ride but same problem came back the funny part is when it all work with the new one I show on my smartcraf all the hours like it work all along

 

Cory at SBMarine was a pretty good source of help and inspiration too!

 

I also have a bit of an intermittent issue going on with my starboard 4/1 gauge and Vessel View gauges. I thought it was related to the momentary ignition switch. I replaced that switch but it is still happening.

I have made a number of upgrades that could have been the cause but the intermittent gauge issue has gone. I replaced the OE Diesel View with a new VV703.

I believe the following most likely was the real cause of the intermittent gauge issue on the starboard side.... found that all Smartcraft Connectors had some light corrosion on the pins. I sprayed each of them with Corrosion inhibitor for Electrical connections.

 

Experts, can I replace my original unit with this one?

 

Experts, can I replace my original unit with this one?
View attachment 85796

Check out this website and info to determine which Vessel View you have and needed components.

https://www.sbmar.com/cummins-dieselview-display-upgrades/

Also I posted more information from my VV Upgrade under under the Electronics section of this site...”Diesel View / Vessel View Upgrade”